Internal-combustion engine



- Fig.1

July -12, 1927. v 1,635,535

E. R: BUR' I'NETT INTERNAL COMBUSTION ENGINE Filed May 15. 1926 fvve /v for Patented July 12, 192 7;

YUNHT if;

EVERETT R. BURTNETT, or LoS 'ANGELE'S, CALIFORNIA, ASSIGNOR, BY DIRECT AND 'ME'SNE ASSIGNMENTS, To THE AUTOMOTIVE vALvEsooaroRATIon, OF RENO, 1 f

NEVADA, A CORPORATION.

INTERNAL-COMBUSTION ENGINE."

Application filed May 15, 1926. Serial No. 1o9,243. 7

My invention relates generally to internal combust1on engines and particularly to engines of the two stroke cycle type, the prin cipal objects of my invention being to 1111-: prove upon the valve structure, valve function, valve cooling and performance of two stroke cycle englnes; to provlde an engine of the character referred to, with a valvular structure consisting of one valve member, for each combustion cylinder, the single valve providing a double valve capacity, one inlet port jregistrationand'port cut-off between the source of freshcharge pumping induction and the combustion chamber, and inlet portregistration and port cut-off between the source of fresh-charge supply and the fresh charge pumping means.

A further object is to provide means of Fig. 1 is a vertical cross section taken through a combustion cylinder and the valve structure of my improved internal combustion'engineg v Referring by numerals to the accompany ing drawings, which illustrate a practical embodiment of my invention, 10 designates a cylinder block, a' combustion cylinder 11 is formed in the cylinder block.

A valve cylinder 12 is formed axially parallel with and to the side of the combustion" cylinder. "A'fresh charge inlet valve'13 is arranged for reciprocatory'movement within the said valve cylinder. A connecting passage 14, formed. as a lateral extension of the chamber formed in the head end of the combustion cylinder intersects the valvecylin der. The valve cylinder extending headwardly and crankwardly from the point at which the "communicating passage which" joinsthe chamber of'the valve cylinder to combustion chamber.

the chamberof the combustion cylinder jintersects the valve cylinder. 1 Y I i A series offresh charge transfer ports 15,

headward of the lateral-extension of the inder,- at a point crankward'of the lateral extension ofthe combustion chamber, a communicating passage 17 is formed between thefresh charge transfer ports 15 and the "said Y are formed in the valve cylinder,at a point An annularopening i 16 is formed in the wall of the valvefc yl-- annular opening 16. opening 18 is formed in the communicating passage 17,"to which may be connectedapassagewith a means of charge pumping.

A spark plug 19 is secured in'the wall of the valve cylinder,-at a point coincident with v the lateral extension of the combustion chamher, the spark plug being screwedinto a threaded aperture 20. The spark plug isarranged toextend through the communicat ing passage 17, the object being to cause the fresh cool charge to pass over. the body of the spark plug, thereby reducing the temgfl" perature of the spark plug.

A11 annular opening 21 is wall of the valve cylinder, at a point crankward ofthe annular opening 16, an open through the cylinderblock, a connection may formed 1 in the.

mg 22 of thisannularopening 1s formed be made between the source of fresh charge I supply and the said opening; v

There are two annular recessesformed in theperiphery. of the inlet valve 13, 'onefa recess 23 is formed at a point most crankwardly of the valve, this annular'recess is adapted to registerpassage "communication; A between the two annular openings 16 and '21 formed in the valve cylinder, the. full peripheryof the valve being designed to cut I ofE'the said passage communication between the Said openmgs'. g The second annular recess 24 is formed the periphery of'the valve. Thisiannularrecess is adaptedcto provide apassage com' and the cut off ofjthepassage communica- 'munication between the'fresh charge trans-f ferports'15 and the combustion chamber,"

tion being accomplished'by"the full peripl ery of the valve.

I A bore25 is machinedto form a cylindricalcenter of the valve'and 'a dependingplugj 1 26 is arranged to be fitted closely within the bore of the valve, the depending plug is confluid being circulated through the cell 27 of the p is Q The head end of the cooling plug is formed as a flange head to the valve cylinder, with an aligning shoulder 28 formed as a step in 'the crank end side of the flange top of the Idated. .lA landis'formed betweenthe two end point to which expansion'rings maybe plug. The cooling fluid cell of the'p'lug extends laterally through the flange head part and communicates with the cooling fluid cell formed around thevalve cylinder.

7 The valve is constructed with a land between the head end and the most headwardly This provides a bearing surface for the valve, also a land of full valve diameter n which expansion rings-may be accommoannular recesses of the valve periphery,,as a central valve bearing surface and as a seclocated inthe periphery of the valve. By-

, this construction'and locatlon' of expansion rings on the valve it will be seen that the annular recess which communicates with the combustion-chamberis provided with inter- I a v 1 catlon from the source offresh charge supnal pressure sealing means.

Exhaust ports 29 are. formed through the wall of the "combustion cylinder 11. A

power pi'ston 30 is arranged for reciprocatory movement within the combustionfcylinder n me the said exhaust ports are, arranged in a'position' relative to the stroke of the said power piston which will permit I the saidexhaust ports being uncovered to the chamber of the combustion cylinder, only at the time the said power piston occupies the position of crank end'dead center. A separate connection is made between the power p ston and the valve by'which the reciprocatimed, relatively with respect to the relativetory movement may be imparted to the said 1 piston and valve member in whatever timing relation is, desired. a

During the time the power piston is moving crankwardly on the crankward stroke the valve is actuated in a headward directioni The piston and valve are preferably time of their stroke movement, which will permit-the exhaust ports to be opened first. At the time the second annular recess 23 of the, valve is moved in a headwardly direction cut olf'of the passage communication betweenthetwo annularopenings 16 and 21 is provided'and the possibility of a back fiow of the fresh charge to thesource' of il suppl is eliminated, When thevalve is actuate in a cran'kwardly direction the annu-' lar recess 23 of" the valve periphery will I engage-the two annular openings, 16 and 21, establishing passage communication between the sourceof fresh charge supply port 22 fresh charge sweeping the recessed periphery of the valve and "of the cooling fluid:

be attached tothe opening 18 of the passage structed hollow to accommodate a cooling 17 I The combined cooling influence of the V plug being fitted within the bore-of the valve will assure ample cooling of the valve for sustalned heavy duty supercharged operation of the engine in two stroke cycle order. 7

- It'will be understood that minor changes in the size, form and construction of the various parts of my im roved engine may be made and substitutec for those herem described without departing from the spirit of the invention, the scope of which. is set forth in the appended claims.

I claim as my invention: 7

1. An internal combustion engine provided with a combustion chamberand with,

a fresh charge inlet valve cylinder chamber,

an inlet valve arranged for reciprocatory movement within the valve cylinder chamber, the periphery of the valve being cyl1n, drical in form, two annulargrooves formed in the said cylindrical periphery of the'valve,

one of the said two annular grooves pro vidin fresh charv 'e inlet assa e communig e e ply, the other oneof the said two annular grooves providmg fresh charge transfer passage communication to th combustion chamber.

'2. An internal combustion engine,- pro- 'v vided with a combustioncylinder chamber and with a fresh charge inlet'valve cylinder chamber, a fresh chargeinlet valve arranged for reciprocatory movement within. the,

valve cylinder chamber, the center of the valve being constructed cylindrical in form,

a cylinder head attached to the valve cylin-1 der, a depending extension. of the valve cylinder head arran ed for a slidingfit with der head.

. 3. The combination with an internal:com- I bustion engine, of a combustion cylinderia valve cylinder, a piston arranged for reciprocatory movement within the combustion cylinder, a valve arranged for reciprocatoryf movement within the valve cylinder a passage joining thechamber of the combustion cylinder with the chamber of the valve cylinder, exhaust ports formed in the wall of a the combustion cylinder, inlet ports formed 7 in the wallet the valve cylinder, the said inlet ports of the valve cylinder being fo'rmedy the valve cylinder, the inlet portscccupying in three planes, the axes of'each of the three planes being at right anglesfto the axis of I one plane being adapted to fresh charge valvular functionto the combustion chamfunction of fresh charge admission to the combustion chamber, the other of the two annular grooves formed in the periphery of the valve being adapted to passage registration and out off with the inlet ports occupying the other two planes and adapted to the function of fresh charge inlet from the source of fresh charge supply;

4. The combination withan internal com- I bustion engine having the usual combustion chamber and piston, of a valve cylinder and an inlet valve arranged for 'reciprocatory movement within the valve cylinder, of a extending crankwardly and arranged asv a I valve cylinder head depending fromthe 1 valve cylinder, the said valve cylinder-head 25 stationary abutment, of sliding fit within" the boreof the valve, of a cooling fluid cell formed within the said cylinder head and extending abutment, of a fluid circulation passagejoining the said cooling fluid cell of the said stationary abutment with the main cooling fluid cells of the engine.

In testimony whereof, I hereto'aflix signature;

myv

EVERETT R. BURVINETT. 

